Naked Egg Drop Rules and Score Sheet
Materials Note: Prohibited materials include any food or food ingredient, all powders (sand, flour, baby
powder), and pastes and gels that stay wet. Dried glues are allowed. All other materials are permitted.
Construction Rules:
1. Egg catchers must be built by the students with no banned materials. After being turned in, no
modifications to the egg catcher are permitted.
2. The egg catcher height may not exceed 25 cm. Measured parallel to the ground, no dimension of the
egg catcher may exceed 25 cm.
3. All materials in the egg catcher must be secured to the structure (see Competition Rule 2)
Competition Rules:
1. The drop height is the perpendicular distance from the ground to the egg catcher’s highest point.
2. After measuring to that verify catcher dimensions are not too tall or big, judges will invert and shake
each egg catcher. Anything that falls out may not be replaced by the judges or student engineers.
3. The eggs are dropped by a student on a ladder, or an egg dropper device, over a tarp on a hard surface.
4. Competitors are responsible for placing the egg catcher and may reposition it between drops.
5. A maximum of three drops are permitted. The first must be from a minimum of 100 cm above the egg
catcher. Each additional drop must be at least 30 cm higher than the previous (up to the maximum
height of the egg dropper) as selected by the competitors.
6. The highest drop that results in a completely undamaged egg—no chips or cracks, even if the egg is
intact—is recorded.
Scoring and Awards:
1. Awards are given for the largest “drop ratio.” drop ratio = the maximum
undamaged egg drop height (cm), divided by the egg catcher height (cm)
2. In case of a tie, the egg catcher with the smallest “minor diameter” (smallest edgeto-edge measurement through the center) is the winner.
You must thoroughly understand the rules and scoring on this page
so that you know the constraints (requirements and limitations) of the problem well,
so you can create a smart winning design.
Naked Egg Drop Activity—Naked Egg Drop Rules and Score Sheet
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Name: _________________________________________________________________
Egg Drop Score Sheet
Students / Team
Material Check
1.____________________
Permitted materials?
yes or no
2.____________________
Shake test:
secure or loose
1.____________________
Permitted materials?
yes or no
2.____________________
Shake test:
secure or loose
1.____________________
Permitted materials?
yes or no
2.____________________
Shake test:
secure or loose
1.____________________
Permitted materials?
yes or no
2.____________________
Date: _____________________________ Class: _______________________________
Shake test:
secure or loose
Dimension Check
Catcher height:
_______________
Width, length and/or
diameter are < 25 cm:
yes or no
Catcher height:
_______________
Width, length and/or
diameter are < 25 cm:
yes or no
Catcher height:
_______________
Width, length and/or
diameter are < 25 cm:
Yes or no
Catcher height:
_______________
Width, length and/or
diameter are < 25 cm:
yes or no
Naked Egg Drop Activity—Naked Egg Drop Rules and Score Sheet
Competition Data
Drop height 1:____________
Break? yes or no
Drop height 2:____________
Break? yes or no
Drop height 3:____________
Break? yes or no
Drop height 1:____________
Break? yes or no
Drop height 2:____________
Break? yes or no
Drop height 3:____________
Break? yes or no
Drop height 1:____________
Break? yes or no
Drop height 2:____________
Break? yes or no
Drop height 3:____________
Break? yes or no
Drop height 1:____________
Break? yes or no
Drop height 2:____________
Break? yes or no
Drop height 3:____________
Break? yes or no
Scoring and Awards
Drop ratio: _________
Rank: _____________
drop ratio = highest drop
height ÷ catcher height
Drop ratio: _________
Rank: _____________
drop ratio = highest drop
height ÷ catcher height
Drop ratio: _________
Rank: _____________
drop ratio = highest drop
height ÷ catcher height
Drop ratio: _________
Rank: _____________
drop ratio = highest drop
height ÷ catcher height
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